Osteochondrosis of the tarsal navicular in a female high school distance runner.

A case of osteochondrosis of the tarsal navicular in an adult is presented. The patient was not fully compliant with the recommendations of the physicians involved and, as a result, full recovery has not been accomplished. Left untreated or undertreated, Mueller-Weiss syndrome can result in severe permanent osteoarthritis of the midtarsal joint (talonavicular joint). This may result in permanent deformity and disability. Properly treated with rest and supportive therapy, the condition is self-limiting and should heal without any sequela.